From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9746BC433DF for ; Fri, 22 May 2020 14:54:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5AD742072C for ; Fri, 22 May 2020 14:54:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590159278; bh=vvAn8EDpPr9ZfwBzIstG1rQ4gCyXCXUholFYEgR/AA0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=s6aGqgLChEJbvEDuo3ZPO1KPt49W3SwKvxVQV76AWp8RjtJnaptg/sZsHhPHa7L7w hAyeIoYPoBCBzgbJUXXg1MSGHiOYUEv4fx5noF2ILVtJ0XloH/7rA1hfw1FJy6UCP5 +xC22EU+m9OUluSwEr5kGE0pF/aU7KLMkLzOueW4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731168AbgEVOyh (ORCPT ); Fri, 22 May 2020 10:54:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:53398 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731020AbgEVOvb (ORCPT ); Fri, 22 May 2020 10:51:31 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6E0D222259; Fri, 22 May 2020 14:51:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590159091; bh=vvAn8EDpPr9ZfwBzIstG1rQ4gCyXCXUholFYEgR/AA0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1xkLJxlheho1YRLiYUdpVv5DIoesF5GMHdjTU5EuVAvYWXu3Pgv0nWL0gydKVHdOo 8ZH4mQ6eQRg7d5tACs3wzYzRdSLXHGi52yzZbkPRHeyAGL3sFlkSYnXZ6s1xz2/duO w2M4TYpBQdfIDnvrcnvGB1ScFTCe5vRrc6duIacA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Bob Peterson , Andreas Gruenbacher , Sasha Levin , cluster-devel@redhat.com Subject: [PATCH AUTOSEL 4.19 09/19] gfs2: move privileged user check to gfs2_quota_lock_check Date: Fri, 22 May 2020 10:51:10 -0400 Message-Id: <20200522145120.434921-9-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200522145120.434921-1-sashal@kernel.org> References: <20200522145120.434921-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bob Peterson [ Upstream commit 4ed0c30811cb4d30ef89850b787a53a84d5d2bcb ] Before this patch, function gfs2_quota_lock checked if it was called from a privileged user, and if so, it bypassed the quota check: superuser can operate outside the quotas. That's the wrong place for the check because the lock/unlock functions are separate from the lock_check function, and you can do lock and unlock without actually checking the quotas. This patch moves the check to gfs2_quota_lock_check. Signed-off-by: Bob Peterson Signed-off-by: Andreas Gruenbacher Signed-off-by: Sasha Levin --- fs/gfs2/quota.c | 3 +-- fs/gfs2/quota.h | 3 ++- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c index 0efae7a0ee80..dd0f9bc13164 100644 --- a/fs/gfs2/quota.c +++ b/fs/gfs2/quota.c @@ -1043,8 +1043,7 @@ int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) u32 x; int error = 0; - if (capable(CAP_SYS_RESOURCE) || - sdp->sd_args.ar_quota != GFS2_QUOTA_ON) + if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) return 0; error = gfs2_quota_hold(ip, uid, gid); diff --git a/fs/gfs2/quota.h b/fs/gfs2/quota.h index 836f29480be6..e3a6e2404d11 100644 --- a/fs/gfs2/quota.h +++ b/fs/gfs2/quota.h @@ -47,7 +47,8 @@ static inline int gfs2_quota_lock_check(struct gfs2_inode *ip, int ret; ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */ - if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) + if (capable(CAP_SYS_RESOURCE) || + sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) return 0; ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); if (ret) -- 2.25.1